1248685570981 has 2 divisors, whose sum is σ = 1248685570982. Its totient is φ = 1248685570980.

The previous prime is 1248685570969. The next prime is 1248685571087. The reversal of 1248685570981 is 1890755868421.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 992396508481 + 256289062500 = 996191^2 + 506250^2 .

It is a cyclic number.

It is not a de Polignac number, because 1248685570981 - 2²³ = 1248677182373 is a prime.

It is a super-2 number, since 2×1248685570981² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1248685570081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 624342785490 + 624342785491.

It is an arithmetic number, because the mean of its divisors is an integer number (624342785491).

Almost surely, 2^{1248685570981} is an apocalyptic number.

It is an amenable number.

1248685570981 is a deficient number, since it is larger than the sum of its proper divisors (1).

1248685570981 is an equidigital number, since it uses as much as digits as its factorization.

1248685570981 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 38707200, while the sum is 64.

The spelling of 1248685570981 in words is "one trillion, two hundred forty-eight billion, six hundred eighty-five million, five hundred seventy thousand, nine hundred eighty-one".